FYI: as my primary effort for AIX concerned ctypes.find_library() - and that is now in the Python3-3.7 branch - when I do a PR it will only be for "current" efforts, i.e., Python3-3.7 and later.
As much as I feel it is important I'll backport myself into branches I'll label "aix.vX.Y.Z", where the starting point is always anew from vX.Y.Z
More detailed: (e.g., on 3.4.8, which I am working on now)
git clone -b v3.4.8 git@github.com:aixtools/cpython.git python-3.4.8
git branch aix.v3.4.8
cat ../aix.patch | patch ...
make and test
git commit -m"my message"
git push to_my_fork
As much as possible, I want to be in sync with python - and give you the option of including anything AIX.
As counts for most, if not all, this is "free-time", not paid - but I will always try to respond to questions re: AIX.
Guido - thank you for the support!